Zanzibar, Swahili Unguja, island in the Indian Ocean, lying 22 miles (35 km) off the coast of east-central Africa. In 1964 Zanzibar, together with Pemba Island and some other smaller islands, joined with Tanganyika on the mainland to form the United Republic of Tanzania. Area 600 square miles (1,554 square km). Pop. (2007 est.) 713,000.
Before the development of eastern African mainland ports, Zanzibar was the trade focus of the region and enjoyed an important entrepôt trade. The island’s economy now depends on agriculture and fishing. Considerable areas of fertile soil and a favourable climate enable the production of a variety of tropical crops, most importantly cloves and coconuts. Local food crops, such as rice, cassava, yams, and tropical fruit, are also important. Fish is an important part of the diet, and local fisheries employ perhaps about one-tenth of the population.